Assigwob to himself



(No Model.) A. BARNES Pitman Connection.

Nor. 232,921. Patented Oct..5,1880.

Urrn STATES PATENT tries.

AMOS BARNES, OF PONTIAC, MICHIGAN, ASSIGNOR TO HIMSELF, JAMES BARNES,AND JOSHUA W. BIRD, ALL OF SAME PLACE, ONE-THIRD TO EACH.

PlTlVIAN-CONNECTION.

SPECIFICATION forming part of Letters Patent No. 232,921, dated October5, 1880.

Application filed August 12, 1889. (No model.)

To all whom it may concern tiac, Oakland count Michi an have invented -&7 b 7 an Improvement in Pitman-Oonnections for Harvester Gutter-Bars, ofwhich the ibllowing is a specification.

The nature of this invention relates to certain new and usefulImprovements in the construction of pitmanconnections for harvester 1ocutter'bars, whereby the lost motion caused by frictional wear isobviated and placed within the control of the operator.

The invention consists in the peculiar construction, arrangement, andcombination of the IS various parts, all as more fully hereinafter setforth.

Figure l is a perspective View of a cutter-bar with my improved pitmanattached. Fig.2 is a similar View, showing the various parts enlarged.-Fig. 3 is a vertical section, showing the manner of connecting thepitman with the knife.

In the accompanying drawings, which form a part of this specification Arepresents the 2 5 cutter-bar ot a harvester, and B the knife, all ofthe usual construction. To the heel of the knife B is rigidly securedthe stud O, which is recessed upon opposite sides, as shown.

D represents the pitman, which is constructed 0 as follows: a is thepush-rod of the pitman, one end of which is properly secured to theWrist'pin b, which is operated by the machine in the ordinary manner.The opposite end of this rod it rests within the recess 0, in the rearface of the stud O. The pull-rod of the pit- 5 Be it known that I, AMOSBARNES, of Pon-.

man consists of two rods, d cl. One end of the rod (Z is properlysecured upon the wrist-pin I), while the outer end of the rod d is bentin the form of a hook, as shown, and rests within the recess h, in theouter face of the stud O. The 40 two meeting ends of the rods (Z d arejoined together by means of a swivel-nut, E, the ends of the rods beingthreaded to receive said nut.

By the use of a pitman constructed substantially as herein described thestrain upon the 5 wrist-pin is brought to bear upon opposite sidesthereof, and any lost motion that may arise from the frictional wear ofthe parts is easily taken up by shortening the length of the rods (1 clby means of the swivelnut.

What I claim as my invention is 1. The combination, with the wrist-pin band stud O, of two independent pitmen, each connected directly andindependently of the other to said pin 1) and stud 0, one pushing andthe other pulling, substantially as described.

2. The combination of the pin 12, stud O, and pitman (0, having one endconnected directly and independently to the said wrist-pin b and stud O,with the rod (1 connected directly to the wrist-pin, and rod 1' having ahooked end fitting into a recess in said stud O, and connected, by aturn-buckle, E, to the rod (1, substantially as and for the purposespecified.

AMOS BARNES.

Witnesses:

H. S. SPRAGUE, THEo. S. DAY.

